[leftmargin=15pt,itemsep=2pt,topsep=2pt]
\(\bullet \)
Due to the mechanism of using a previous reconstructed frame as reference, error propagation problem is common in the methods based on the traditional framework, for no matter codecs or learned methods [1]};
\(\bullet \)
The accuracy of a predicted frame may decrease due to errors from motion prediction or propagated from earlier frames, resulting in residual errors which will then increase the difficulty of residual compression;
\(\bullet \)
Training and inference with the current framework are computationally expensive due to its complexity.

